{"id":"UBUNTU-CVE-2021-33056","details":"Belledonne Belle-sip before 4.5.20, as used in Linphone and other products, can crash via an invalid From header in a SIP message.","modified":"2026-01-20T17:19:24.049241Z","published":"2021-08-12T21:15:00Z","upstream":["CVE-2021-33056"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-33056"},{"type":"REPORT","url":"https://github.com/BelledonneCommunications/belle-sip/commit/116e3eb48fe43ea63eb9f3c4b4b30c48d58d6ff0"},{"type":"REPORT","url":"https://github.com/BelledonneCommunications/belle-sip/compare/4.5.15...4.5.20"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-33056"}],"affected":[{"package":{"name":"belle-sip","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/belle-sip@1.4.1-1.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.1-1","1.4.1-1.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libbellesip-dev","binary_version":"1.4.1-1.1"},{"binary_name":"libbellesip0","binary_version":"1.4.1-1.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33056.json"}},{"package":{"name":"belle-sip","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/belle-sip@1.6.3-2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.1-1.1","1.6.3-2"],"ecosystem_specific":{"binaries":[{"binary_name":"libbellesip-dev","binary_version":"1.6.3-2"},{"binary_name":"libbellesip0","binary_version":"1.6.3-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33056.json"}},{"package":{"name":"belle-sip","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/belle-sip@1.6.3-5?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.3-5"],"ecosystem_specific":{"binaries":[{"binary_name":"libbellesip-dev","binary_version":"1.6.3-5"},{"binary_name":"libbellesip0","binary_version":"1.6.3-5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33056.json"}},{"package":{"name":"belle-sip","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/belle-sip@4.4.21+dfsg-1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.21+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libbellesip-dev","binary_version":"4.4.21+dfsg-1"},{"binary_name":"libbellesip1","binary_version":"4.4.21+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33056.json"}},{"package":{"name":"belle-sip","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/belle-sip@5.2.0+dfsg-3.1build3?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.0+dfsg-3","5.2.0+dfsg-3.1build1","5.2.0+dfsg-3.1build2","5.2.0+dfsg-3.1build3"],"ecosystem_specific":{"binaries":[{"binary_name":"libbellesip-dev","binary_version":"5.2.0+dfsg-3.1build3"},{"binary_name":"libbellesip2t64","binary_version":"5.2.0+dfsg-3.1build3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33056.json"}},{"package":{"name":"belle-sip","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/belle-sip@5.3.105+dfsg-4?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3.105+dfsg-4"],"ecosystem_specific":{"binaries":[{"binary_name":"bellesip-data","binary_version":"5.3.105+dfsg-4"},{"binary_name":"libbellesip-dev","binary_version":"5.3.105+dfsg-4"},{"binary_name":"libbellesip3","binary_version":"5.3.105+dfsg-4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33056.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}